|
||
|
|
|
|
Thread Tools | Display Modes |
3rd January 2014, 13:04 | #1 |
Gets stuck in
ZT-T CDTi + Join Date: Nov 2006
Location: London
Posts: 561
Thanks: 7
Thanked 10 Times in 7 Posts
|
CDTi Bosch MAF sensor - swap over the sensor, or change the whole assembly?
Hi chaps,
It's winter, and the dear old ZTT 2.0CDTi is sulking and wants some attention. Part of that is draining its battery overnight (I'll be checking the glow plug circuit shortly, as the car does not have factory sat nav - the battery is healthy and the alternator is putting out a good charge)... ...the other problem is a longer-term one, that of poor starting. I thought this might be the cam position sensor, but no, a new one didn't cure the problem. Argh. Putting a diagnostic on the car revealed that there was no MAF signal at all - kind of weird that the car still runs without the MIL illuminating...? The MAF on the car is a Pierberg with a Rover Ron MAFAM. Sorry to say MAFAM fans, I haven't found this box to transform the car, and perhaps one reason is that the MAF has never provided the correct signal??? Cutting a long story short, I've decided to bite the bullet and buy a new Bosch MAF and disable the MAFAM and see how the car runs before doing anything else. It's raining outside, so to reduce my exposure to the elements I am thinking of removing the Bosch sensor from the new MAF assembly and installing this in to the old one in the car, after removing the Pierberg. Any reason not to do this? Should I replace the whole assembly? What do you chaps think? |
3rd January 2014, 14:11 | #2 |
Gets stuck in
ZT-T CDTi + Join Date: Nov 2006
Location: London
Posts: 561
Thanks: 7
Thanked 10 Times in 7 Posts
|
Just having a look at the part. I can't see any reason not to change just the sensor - so this is what I'll do... and will post more soon
|
3rd January 2014, 14:15 | #3 |
Premium Trader
Rover 75 Join Date: Nov 2010
Location: Devon
Posts: 33,763
Thanks: 8,837
Thanked 14,831 Times in 8,030 Posts
|
I have just changed the sensor in the past, no problems at all.
__________________
Lest we forget..
|
3rd January 2014, 14:19 | #4 |
Posted a thing or two
V6 2ltr auto in copperleaf +CDTI Auto in Royal Blue on loan to Son Join Date: Jul 2010
Location: Tewkesbury, Gloucestershire
Posts: 1,707
Thanks: 105
Thanked 476 Times in 267 Posts
|
Did you notice the screws are 5 NOT 6 point torx security
sold here http://www.amazon.co.uk/Silverhill-P...s=5+point+torx or you may be able to remove the screws with a pair of long nosed pliers. .
__________________
|
3rd January 2014, 17:51 | #5 |
Gets stuck in
ZT-T CDTi + Join Date: Nov 2006
Location: London
Posts: 561
Thanks: 7
Thanked 10 Times in 7 Posts
|
Thanks - yes I did. I have a set of these specifically for the purpose. Blooming annoyingly though, I now can not find them.... gggrrrrr!
|
3rd January 2014, 20:07 | #6 |
Passed Away
Rover 75 CDT 03 auto Conn. SE Join Date: May 2009
Location: London
Posts: 2,885
Thanks: 104
Thanked 254 Times in 204 Posts
|
Pierburgh
The purpose of the MAFAM is to allow you to match the Pierburgh Maf to your engine (mine was set at about 2.30). It is not a tuning box, just a substitute for the Bosch. Mine worked perfectly well for six years. Try unplugging the connector from your Maf and see how the car runs. It should be perfectly ok. Then try your new Maf and note any differences. You may well find that the only difference is improved MPG readings. Just change the sensor when you can remove the screws!
Last edited by wuzerk; 3rd January 2014 at 20:11.. |
3rd January 2014, 21:09 | #7 |
Gets stuck in
ZT-T CDTi + Join Date: Nov 2006
Location: London
Posts: 561
Thanks: 7
Thanked 10 Times in 7 Posts
|
Mine is the tuning box - and was using the MAFAM to utilise the Pierberg MAF as Bosch was stupidly expensive back then. But I never did get the performance gains others found...
Still can't find the darn 5-point torx bits: we have had building work since I last used them, so they'll be squirreled away somewhere (I hope!) |
4th January 2014, 08:31 | #8 | |
Passed Away
Rover 75 CDT 03 auto Conn. SE Join Date: May 2009
Location: London
Posts: 2,885
Thanks: 104
Thanked 254 Times in 204 Posts
|
Quote:
across them for easy removal in the future. |
|
4th January 2014, 17:28 | #9 |
Gets stuck in
ZT-T CDTi + Join Date: Nov 2006
Location: London
Posts: 561
Thanks: 7
Thanked 10 Times in 7 Posts
|
Cheers chaps
Actually found the bits - hidden under my nose as it turned out! LOL Still, at least I got to tidy up the garage and start organising things that I've been meaning to do for ages!!! New MAF fitted, the MAFAM removed and... no start. Flat battery. I thought that the battery was good, but even after charging, turning on the ignition dropped the potential across the terminals to 11v - which dropped further to 8v when attempting to crank. I suspect the battery is dead. Predictably, the battery's warranty has just expired, so I'll have to stump up for a new one... and of course, I've missed the open hours at Eurocarparts We need the car, so I suspect that we'll have to pay the extra premium and buy from Halfords tomorrow... Will probably get the Yuasa 096. Dimensionally, it's a little taller (15mm) than the 100 Varta currently fitted - but a quick search on here suggests that most people find that it fits okay? Yuasa 096: 80Ah 760A CCA Dimensions l:278; w:175; h:190mm |
4th January 2014, 18:48 | #10 |
Moderator
MG-ZTT Join Date: Mar 2007
Location: Ware, Herts
Posts: 19,798
Thanks: 161
Thanked 1,249 Times in 1,036 Posts
|
Rob
Before Halfords, try a local motor factors, you may get a better deal from them
__________________
David Impecunity is the mother of ingenuity Useful how to's for common problems Car Of The Month Jan 2014 [SatNav Power Down] [Coolant Level] [SatNav Repair] [Diesel Non Starting] [Paint Codes] [Rear Light Seals] [Reversing Light Switch] [Bleeding Brakes][Sunroof Drain] [Early ZT's][Instrument Pack Diagnostics][ATC Diagnostics] |
|
|